<template>
  <div>
    <div class="search">
      <input class="search-input" type="text" v-model="keyword" placeholder="输入城市名或拼音"/>
    </div>
    <div class="search-content" v-show="keyword" ref="search">
      <ul>
        <li class="search-item border-bottom" v-for="item of list" @click="handleCityClick(item.name)">{{item.name}}</li>
        <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>
<script>
  import Bscroll from 'better-scroll'
  export default {
    name:'CitySearch',
    data(){
      return{
        keyword:'',
        list:[],
        timer:null
      }
    },
    props:{
      cities:Object
    },
    computed:{
      hasNoData(){
        return !this.list.length;
      }
    },
    watch:{
      keyword(){
        if(this.timer){
          clearTimeout(this.timer)
        }
        if(!this.keyword){
          this.list=[];
          return;
        }
        this.timer = setTimeout(() => {
          const result = [];
          for(let i in this.cities){
            this.cities[i].forEach((value)=>{
              if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                result.push(value);
              }
            })
          }
          this.list = result;
        },100)
      }
    },
    methods:{
      handleCityClick(city){
        //先派发
        //若没有异步或批量操作可直接使用this.$store.commit('changeCity',city),直接调用mutations中的changeCity方法修改数据
        this.$store.dispatch('changeCity',city);
        //执行页面的跳转
        this.$router.push('/');
      }
    },
    mounted() {
      this.scroll = new Bscroll(this.$refs.search);
    }
  }
</script>
<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .search
    height .72rem
    padding 0.1rem
    background $bgColor
    .search-input
      padding .1rem
      box-sizing border-box
      height .62rem
      line-height .62rem
      width 100%
      text-align center
      border-radius .006rem
      color #666
  .search-content
    z-index 999
    overflow hidden
    position absolute
    top:1.68rem
    left: 0
    right: 0
    bottom: 0
    background-color #eee
    .search-item
      line-height .62rem
      padding-left .2rem
      color #666
      background-color #fff


</style>
